red sea calcium pro reagent refill kitBy Chuckon 10/7/2016

I really like this test kit, ever since the first time. This refill is because I am about to run out of solutions.

Easy, Quick and AccurateBy Lawrenceon 9/7/2016

Lawrence would recommend this product to a friend

When I started reef keeping over 4 years ago I tried brands. Of all of them i found the Red Sea Calcium Test to be easy, quick and most importantly accurate. I have been using it for nearly two years and wouldn't even think of using another product.

Excellent product! By cHillwAterfiShon 5/6/2016

cHillwAterfiSh would recommend this product to a friend

I've been using this test kit for over 2 years. When I reordered the refill, the bottle cap wasn't sealing properly and 60% of it leaked. However, BRS replaced it right away! Great item and great customer service! I highly recommend this product.

Quick. Easy to use. Economical because you don't have to buy a whole kit. I have been steadily using this test for almost 2 years. By juschillin2on 4/26/2016

juschillin2 would recommend this product to a friend

As stated above, I like every aspect of the refill kit

Quick and EasyBy Jackonyon 4/16/2016

Jackony would recommend this product to a friend

There are a few steps to this one but it's still quick and easy. Wrote myself a small reminder to mark the result as the purple with slight pink tinge turns to a definate dark blue. Keep my results more consistent and accurate that way. Wrinse to clean. Most tests take about 5 mins.

ExcellentBy Aquatics 25on 3/27/2016

Aquatics 25 would recommend this product to a friend

Accurate,fast and very easy to use. Love just to buy reffil.

Nice to buy refilBy Samuelon 3/26/2016

Samuel would recommend this product to a friend

I like the fact I can just buy one refil for the original kit I bought

Excellent productBy juschillin2on 7/6/2015

juschillin2 would recommend this product to a friend

Purchased this kit to refill my Red Sea Calcium test kit. A really good value. I trust this brand for accurate results. Easy to use.

I'm happy with it.By Daveon 6/19/2015

Dave would recommend this product to a friend

The color changes abruptly, enabling you to make accurate measurements.

Excellent productBy juschillin2on 6/7/2015

juschillin2 would recommend this product to a friend

Best calcium test I have used. Accurate and easy to use. Refill option is the best!

Accurate and easy to testBy Tekon 11/25/2014

Tek would recommend this product to a friend

Accurate and quick test. Great value refills as opposed to buying new kits each time.

Got very different readings with new refillBy Joeon 8/27/2013

Joe would recommend this product to a friend

I just got the refill on the Ca test. However, the original kit gave a Ca reading of 415 ppm, which seemed too low give Alk levels and Ca reactor drip rate. The new reagents, tested at the same time, gave a Ca value of 575 ppm (measured twice). That's a huge difference from the same kit.

The original kit was about 1.5 years old, so my only guess is that the reagents go bad in a year or less.